there are people in my area that run on 91 with compression levels ranging from 10.5:1 to 11.7:1. i guess it all depends on the setup.

 

Well we run 93 here...ill be on the lookout for higher octane..i only put mobil though...i atlked to some more people and saw some dynos it turns out the higher compression gives a power increase throughout the powerband...which is beyond good...ill prolly install it in the next few weeks with a jdm final drive..=)..ill let you guys know how it feels etc..thanks for all the help...